49ers lose two more tackles in first half against Eagles

Already without starting right tackle Trent Brown, the 49ers lost two more tackles in the first half of Sunday’s game against the Eagles.

Brown was made inactive after suffering a concussion last week against the Cowboys. His replacement, Garry Gilliam, left Sunday’s game in the second quarter with an apparent leg injury and was ruled out after getting treatment.

Left tackle Joe Staley was taken back to the locker room following Jalen Mills’ pick-6 near the end of the half with a bleeding gash under his right eye. Staley took a big block from defensive lineman Fletcher Cox on the interception return and was ruled out in the third quarter.

Gilliam was initially replaced by Zane Beadles, who switched to the left side on the final drive of the half to replace Staley. That allowed Erik Magnuson to make his NFL debut at right tackle. That’s where Magnuson played at Michigan. But he’s spent most of his time along the interior since joining San Francisco.

Magnuson, in essence, is San Francisco’s fourth-string right tackle. Beadles would be the third-string option on the left side with Gilliam out. Staley’s name has been mentioned in trade rumors, but moving him would create a massive void along the offensive line given the team’s current injury woes. Only five offensive lineman would be healthy with Staley and Gilliam out.

The 49ers hit halftime down 17-0 to the Eagles. San Francisco’s defense appeared up to the task by registering three sacks of Carson Wentz and just 119 yards offense. But Mills’ touchdown was Philadelphia’s second score in 17 seconds of game time.

Beathard threw two interceptions and completed just 7 of 15 for 63 yards in the first half. San Francisco had 106 yards of offense and went 1 for 8 on third downs.